The family of a mentally ill black man who was fatally shot in a 2014 confrontation with a white police officer in a downtown Milwaukee park has sued the Police Department, officer Christopher Manney and the city.

The U.S. Justice Department announced plans Tuesday to work with Milwaukee police on implementing reforms following the fatal shooting of a mentally ill black man in a confrontation with a white officer last year at a downtown park.

Two police officers testified Saturday during an appeals hearing for a Milwaukee officer who was fired for inappropriately frisking a mentally ill black man before fatally shooting the man during a scuffle.

The adage that prosecutors can “indict a ham sandwich” has been called into question recently, when grand juries declined to prosecute officers involved in the deaths of Michael Brown in Ferguson, Mo., and Eric Garner in New York.